it does ? how ? or are you saying the cards actually lie differently and another line works ?I can see that if W has Jxx(x), A(Q), QJ10xx, 10xx(x) that line will also work.

CyberYeti guessed the actual layout almost exactly and his line has excellent practical chances.
Unfortunately, if I unblock ♣ and lead a ♥, West defeats me by exiting with ♦J to end-play me in ♦s. I get 4 ♦ tricks but end up a trick short
All a bit double-dummy, but a pretty defence.

CyberYeti guessed the actual layout almost exactly and his line has excellent practical chances.
Unfortunately, if you unblock ♣ and lead a ♥, West can defeat you by exiting with ♦J to end-play you in ♦s. You get 4 ♦ tricks but end up a trick short
All a bit double-dummy, but a pretty defencce.

Well if you weren't up to disposing of the ♦8 at trick 1 and winning trick 2 with the 9 so W can't unblock admittedly he should return the 7 not the 4 to prevent this, but this is difficult to envision at trick 2.

And E has to discard correctly so he retains his 4th heart to give you the ♥J but no 9th trick.

For completeness, given Cyberyeti;s 3rd suggested layout, after the first 2 tricks, GIB demonstrates that defenders can defeat 3N, at double-dummy, on a similar defence, end-playing declarer in ♦s.Against this distribution, GIB shows that, declarer succeeds, at double-dummy, only on a ♣ lead.IMO, like Géza Ottlik and Hugh Kelsey, GIB can reveal fascinating opportunities in seemingly hum-drum deals.
Some have practical application, once you are aware of such possibilities.Thomas Andrews has discovered wonderful deals, using GIB

Cyberyeti's line seems sensible to me. -- In fact, that's what I did.
Unfortunately, as the cards actually lie, our line fails against best defence.

I sympathise with both defence and offence, but unless I am mistaken 3NT is impossible as the cards lie: even 2NT will fail against a ♠ lead, or if S ducks the ♦ lead like nige1 did and W then switches to ♠.
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I sympathise with both defence and offence, but unless I am mistaken 3NT is impossible as the cards lie: even 2NT will fail against a ♠ lead, or if S ducks the ♦ lead like nige1 did and W then switches to ♠.
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How does NT play if you play low on the spade lead in dummy, win the A, cash one diamond and two clubs then lead a heart ? (on the layout you posted this against, not the original)

CyberYeti surmised that this was the actual layout.Pescetom assessed prospects as hopeless against perfect defence.But, after the actual defence (see OP) of ♦Q lead, ducked; and a small ♦, won by declarer's ♦8, GIB tells us that declarer can succeed by cashing ♣AK and ♦APlease press Next to play those cards and arrive at this position..Now, LHO can save the overtrick by -- carefully unblocking a ♦ honour on ♦A and then -- playing low on declarer's ♦K continuationFinally, declarer leads ♥2 to endplay whichever opponent wins the trick Double-dummy but pretty stuff